MyTopo now offers large-format topo maps, aerial photos and satellite images printed with property lines for most parts of the United States *. They are also available on SD cards for use with some popular electronic devices. Land boundaries are valuable to realtors, hunters, land surveyors, government agencies and more.

* The dates of private land boundary updates varies from county to county and are dependent on data sources and how often they release updated information. MyTopo releases the latest info it has collected a few times per year. Private property boundaries are compiled from government and other sources and should be used for reference only. These maps are not a legally recorded map or survey. Get full information on the MyTopo website.

Petroglyph Photo GalleryGeology.com
A petroglyph is an image that is carved into a rock. This “carving” can produce a visible indentation in the rock or it can simply be the scratching away of a weathered surface to reveal unweathered material of a different color below.

Better Photos With Your Cell PhoneGeology.comThese almandite-spessartite garnets are from an alluvial deposit in Idaho. They have been transported a short distance from their source rock, and some still retain evidence of their dodecahedral crystal form. They are about four to five millimeters in size and weigh about 0.6 to 0.8 carats each. Some of the surface pitting in the more abraded pieces is a result of soft inclusions wearing away.

What is a Maar ?Geology.com
A maar is a shallow volcanic crater with steep sides that is surrounded by tephra deposits. The tephra is thickest near the crater and decrease with distance. Maars are formed by underground explosions that occur when ascending hot magma comes into contact with shallow ground water to produce a violent steam explosion. These explosions crush the overlying rocks and launch them into the air along with steam, water, ash and magmatic material. The materials usually travel straight up and fall back to Earth to form the tephra deposits that surround the crater.

What Is a Salt Glacier ?Geology.com
A salt glacier forms when a salt dome breaks through Earth’s surface and the salt spreads out and flows across the surface under its own weight. They can persist only in arid climates where precipitation will not dissolve the salt and carry it away.

Rite in the Rain bound books are manufactured with true outdoor-durable components. This bound book with factory-numbered pages and project identification form (project/client location, date) on every page is suitable for taking important notes that might be required for regulatory review or legal testimony. Included are 20 reference pages and removable photographic scale. Book has 63 leaves (136 pages) and measures 7 1/2″ x 4 3/4″.

The folks at MyTopo.com are now printing TopoPhotos. They are aerial photographs with contour lines and topographic map annotations lightly superimposed. They give you the advantages of an aerial photograph but also include the elevation, road and place name details of a topographic map. You can use their website to order a TopoPhoto centered anywhere in the United States and have it printed in a variety of sizes in either landscape or portrait orientation. You can print them up to a huge 8′ x 5′ (or 5′ x 8′) in size.

We are constantly looking for interesting items related to geology and general science. When we find something interesting we share it here.
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